File:Future Combined with Science Fiction October 1941.jpg|thumb|right|Wollheim's "Pogo Planet", the first installment of his "Alex Calkins" series, was the cover story for the October 1941 issue of ''Future Science Fiction and Science Fiction Stories|Future''. It appeared under Wollheim's "Martin Pearson" pseudonym and was illustrated by Hannes Bok.
'''Donald Allen Wollheim''' (October 1, 1914 – November 2, 1990) was an American people|American
science fiction List of science fiction editors|editor
, publisher, List of science fiction authors|writer
, and science fiction fandom|fan
. As an author, he published under his own name as well as under pseudonyms, including '''David Grinnell'''.
A founding member of the Futurians
, he was a leading influence on science fiction development and fandom in the 20th century United States.